AppOpenAd

App open ads are used to display ads when users enter your app. An AppOpenAd
object contains all the data necessary to display an ad in an AppOpenAdView
object. Unlike interstitial ads, app open ads make it easy to provide an app branding area so
that users understand the context in which they see the ad. Use one of the static
load methods to load an AppOpenAd. Then, set the ad on an
AppOpenAdView
to render it.